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A kind of hydrodemetallization catalyst and preparation method thereof

A hydrodemetallization and catalyst technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve metal waste, shorten start-up time, and disperse active metals To solve problems such as poor temperature, achieve the effects of convenient storage and transportation, increase vulcanization temperature, and high demetallization activity

Active Publication Date: 2019-06-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to avoid excessive temperature rise, the vulcanization process heats up slowly, but this will cause the catalyst vulcanization time to be too long, which is not conducive to shortening the start-up time
Furthermore, both the existing internal presulfurization and external presulfurization will cause insufficient vulcanization of the active metal component in the hydrogenation catalyst, poor dispersion of the active metal, and the inability of the active metal component to fully play its role, resulting in metal waste

Method used

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  • A kind of hydrodemetallization catalyst and preparation method thereof
  • A kind of hydrodemetallization catalyst and preparation method thereof
  • A kind of hydrodemetallization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation of embodiment 1 catalyst carrier

[0051] (1) Preparation of carrier A-1

[0052] Weigh 900g of macroporous pseudoboehmite (73wt% on a dry basis), 19g of scallop powder, 32g of citric acid, 48mL of nitric acid (30wt%), 159mL of silica gel (containing 30wt% of silicon dioxide), polystyrene and Mix 20g each of polyethylene glycol 2000 and 250mL deionized water evenly, extrude into 1.2mm clover strips on an extruder, dry at 120°C for 4 hours, and roast at 600°C for 3 hours to obtain carrier A-1, and the pore volume of carrier A-1 0.7cm 3 / g, the average pore diameter is 35.6nm, and the intensity is 176N / cm.

[0053] (2) Preparation of carrier A-2

[0054] Weigh macroporous pseudo-boehmite (73wt% on a dry basis) 830g, turnip powder 19g, citric acid 32g, nitric acid (30wt%) 48mL, silica gel (containing silicon dioxide 30wt%) 200mL, alumina powder 50g, 20g each of polystyrene and polyethylene glycol 2000, and 250mL of deionized water were mixed evenly, ext...

Embodiment 2

[0055] Example 2 Preparation of Hydrodemetallization Catalyst B

[0056] Weigh 20.6 g of ammonium molybdate, 14.1 g of nickel nitrate, and 30 mL of ammonia water, and mix them with deionized water to 100 mL to obtain impregnating solution I. Measure the impregnation solution I according to the water absorption rate of 100mL / 100g and spray the impregnation carrier A-1. After spraying, heat treatment at low temperature at 80°C for 3 hours. Dissolve 20 g of 2,4,6-trimercapto-s-triazine triammonium salt in 50 mL of water to obtain impregnation solution II, spray the impregnation solution II on the low-temperature heat-treated sample, and dry it in the shade in a ventilated place to obtain the hydrodemetallization catalyst B. The physical properties are shown in Table 1.

Embodiment 3

[0057] Example 3 Preparation of Hydrodemetallization Catalyst C

[0058] Weigh 28 g of 2,4-dimercapto-s-triazine diammonium salt and dissolve it in 100 mL of acetone solution to obtain impregnation solution I, and then spray carrier A-2 with impregnation solution I. After spraying, the first low-temperature heat treatment is carried out, and the first low-temperature heat treatment condition is: 80° C. low-temperature heat treatment for 3 hours. Then take 17.1g of molybdenum oxide, 6.1g of basic nickel carbonate, 1.5mL of phosphoric acid, and 60mL of deionized water and boil for an hour to obtain impregnation solution II. Measure the impregnation solution II according to the water absorption rate of 100mL / 100g and spray and impregnate the first low-temperature heat treatment The sample was subjected to a second low-temperature heat treatment. The second low-temperature heat treatment condition was: heat treatment at 120° C. for 5 hours to obtain a hydrodemetallization catalyst...

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Abstract

The invention discloses a hydrogenation demetalization catalyst and a preparation method thereof. The catalyst comprises a hydrogenation active metal component and a carrier, and also comprises an organic compound. The catalyst realizes direct in-situ sulfuration of the metal on the surface of the catalyst without a generation reaction of hydrogen sulfide or a sulfuration reaction of hydrogen sulfide and the active metal in the starting sulfuration process, so the initial sulfuration temperature at working starting of the catalyst is greatly improved, the problem of too fast temperature rising in the catalyst sulfuration process is solved, and the starting time is greatly shortened.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation catalyst, in particular to a hydrogenation demetallization catalyst and a preparation method thereof. Background technique [0002] Residue is the heaviest fraction of crude oil and contains high concentrations of metals and asphaltenes. The nature of catalyst deactivation is determined by the nature of special raw materials, and the deactivation of residual oil catalyst mainly depends on metal deposition and coke formation. These impurities cover the surface of the catalyst, reducing the number of active centers, or blocking the pores of the catalyst, hindering the utilization of the inner surface, resulting in the decay of the catalyst activity. Metals in residual oil mainly exist in the form of organometallic compounds (such as nickel and vanadium mainly exist in the form of porphyrin compounds and asphaltenes), these metal compounds decompose during the reaction, and heavy metals are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C10G45/08
Inventor 徐黎明高玉兰吕振辉张学辉佟佳孙海
Owner CHINA PETROLEUM & CHEM CORP
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